Structural Oscillation Revealed in Gold Nanoparticles
- 9 June 2020
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 142 (28), 12140-12145
- https://doi.org/10.1021/jacs.0c02117
Abstract
Oscillation is an intriguing phenomenon in nature. However, structural oscillation has not yet been found in semiconducting nanoparticles, primarily due to the difficulty of structural resolution at the atomic level. The emergence of gold nanoclusters (ultrasmall nanoparticles) has provided an excellent opportunity to address some challenging issues in the nanoparticle field. Herein, two Au28(CHT)20 (CHT: cyclohexanethiolate) structural isomers (Au28i and Au28ii for short) were concurrently synthesized by employing a quasi-antigalvanic method, and they could be reversibly transformed into each other for at least 10 cycles, driven by dissolution and crystallization processes. The transformation from Au28ii to Au28i is solvent-dielectric-constant-dependent, with a notable deuteration effect from dichloromethane. The markedly different photoluminescence values of these two isomers not only have important implications for the structure–property correlations but also have potential applications in converting, sensing, etc.Funding Information
- State Administration of Foreign Experts Affairs
- Hefei Center for Physical Science and Technology (2017FXCX002)
- Hefei Institutes of Physical Science, Chinese Academy of Sciences (BJPY2019A02, KP-2017-16)
- National Natural Science Foundation of China (21171170, 21222301, 21528303, 21573212, 21603234, 21701179, 21771186, 21829501, 21925303, 51502299)
- Chinese Academy of Sciences
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